@inproceedings{oai:jaxa.repo.nii.ac.jp:00037102,
 author = {小濱, 泰昭 and 江上, 泰広 and Kohama, Yasuaki and Egami, Yasuhiro},
 book = {航空宇宙技術研究所特別資料, Special Publication of National Aerospace Laboratory},
 month = {Dec},
 note = {航空宇宙技術研究所 26-28 Mar. 1997 東京 日本, National Aerospace Laboratory 26-28 Mar. 1997 Tokyo Japan, 3次元境界層に対する遷移予知と層流制御(LFC)手法に対する有力な1方法を論じた。本質的に別個の不安定性として扱ってきた一般の3次元境界層を同一の不安定性として扱った。一般の3次元境界層に現れる不安定性は「3次元遠心力不安定性」として考えることができる。3次元遠心力不安定性は壁面に平行および直角な流線曲率の存在により発生する。1次不安定性の発生予知のために新たに1組のパラメータC(sub 1)とC(sub 2)を導入し、極めて良好な予知基準を得た。2次不安定性の発生に対しては、局所的速度分布を正確に測定し、新規予知パラメータK(sub 2)を導入した。極めて複雑な遷移構造を考慮して、遷移を遅らせるために独特な選択吸込み法を導入した。この吸込み法は従来型の一様吸込み法と比べて流れ場を制御するのに吸込みが少なくてよいという利点がある。一様吸込みと比べて約半分の吸込みパワーで30%以上遷移を遅らせることが可能となった。, One possible method for transition prediction and Laminar Flow Control (LFC) technique for Three-Dimensional (3D) boundary layers are discussed. General 3D boundary layers, which have been essentially treated as different instabilities, are treated as the same instability. Instabilities that appear in general 3D boundary layers can be considered as '3D centrifugal instability'. That occurs because of the existence of the streamline curvature both parallel and perpendicular to the wall surface. A pair of new parameter C(sub 1), C(sub 2) is introduced for the prediction of the primary instability onset and fairly good prediction standard is obtained. For the onset of the secondary instability, local velocity profile is measured accurately and created new prediction parameter K(sub 2). Considering very complicated transition structure, unique distributed suction method is introduced in order to delay the transition. This suction method has advantage to conventional uniform suction method in less suction power needed to control the flow field. Beyond 30 percent transition delay is successfully attained by about half of the suction power for uniform suction., 資料番号: AA0001320012, レポート番号: NAL SP-36},
 pages = {45--48},
 publisher = {航空宇宙技術研究所, National Aerospace Laboratory (NAL)},
 title = {縦渦型乱流遷移の予知と層流制御},
 volume = {36},
 year = {1997}
}